Contains the worst helicopter sequences I've seen in a long time. After seeing the real copter on the ground, they use a combination of CGI for the (very brief) exterior shots of it flying and many, many closeups in a wildly bouncing mockup. I never once believed they were flying. I've seen some sorry attempts to depict people in a helicopter midflight but this takes the cake. Pathetic considering the copter vs. sharknado sequence was supposedly one of the highlights.